IEC TR 60269-5:2014
(Main)Low-voltage fuses - Part 5: Guidance for the application of low-voltage fuses
Low-voltage fuses - Part 5: Guidance for the application of low-voltage fuses
IEC/TR 60269-5:2014 serves as an application guide for low-voltage fuses, shows how current-limiting fuses are easy to apply to protect today's complex and sensitive electrical and electronic equipment. This guidance specifically covers low-voltage fuses up to 1 000 V a.c. and 1 500 V d.c. designed and manufactured in accordance with IEC 60269 series. This guidance provides important facts about as well as information on the application of fuses. This second edition cancels and replaces the first edition published in 2010. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition:
- recommendations for fuse operations in high altitudes added,
- more details for operational voltages added,
- recommendations for photovoltaic system protection added,
- numerous details improved Keywords: application guide for low-voltage fuses, current-limiting fuses
Fusibles basse tension - Partie 5: Lignes directrices pour l'application des fusibles basse tension
L'IEC/TR 60269-5:2014 est un guide d'application des fusibles basse tension, montre que les fusibles limiteurs de courant sont faciles à utiliser pour protéger le matériel électronique complexe et sensible d'aujourd'hui. Ces lignes directrices couvrent spécifiquement les fusibles basse tension de tensions jusqu'à 1 000 V en courant alternatif et 1 500 V en courant continu selon la série IEC 60269. Elles fournissent des informations sur les fusibles ainsi que sur leurs applications. Cette deuxième édition annule et remplace la première édition parue en 2010. Cette édition constitue une révision technique. Cette édition comporte les modifications techniques suivantes en rapport avec l'édition précédente:
- les recommandations et préconisations pour le fonctionnement des fusibles à des altitudes supérieures;
- l'ajout d'informations concernant les différentes tensions de fonctionnement des fusibles;
- l'ajout de recommandations pour la protection des systèmes photovoltaïques;
- l'amélioration de nombreux détails. Mots clés: guide d'application des fusibles basse tension, les fusibles limiteurs de courant
Nizkonapetostne varovalke - 5. del: Navodila za uporabo nizkonapetostnih varovalk
IEC/TR 60269-5:2014 se uporablja kot navodilo za uporabo nizkonapetostnih varovalk in prikazuje, kako je varovalke, ki omejujejo tok, enostavno uporabiti za zaščito današnje kompleksne in občutljive električne ter elektronske opreme. Ta navodila posebej obravnavajo nizkonapetostne varovalke do 1000 V izmenične napetosti in 1500 V enosmerne napetosti, ki so zasnovane in izdelane v skladu s skupino standardov IEC 60269. V teh navodilih so podana pomembna dejstva in informacije o uporabi varovalk. Druga izdaja razveljavlja in nadomešča prvo izdajo, objavljeno leta 2010. Ta izdaja je tehnično popravljena izdaja. Ta izdaja v primerjavi s prejšnjo vključuje naslednje pomembne tehnične spremembe:
– priporočila za delovanje varovalk na visokih nadmorskih višinah,
– več podrobnosti za delovne napetosti,
– priporočila za zaščito fotonapetostnega sistema,
– številne podrobnosti izboljšanih ključnih besed: navodila za uporabo nizkonapetostnih varovalk, varovalke za omejevanje toka
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2022
Nizkonapetostne varovalke - 5. del: Navodila za uporabo nizkonapetostnih
varovalk
Low-voltage fuses - Part 5: Guidance for the application of low-voltage fuses
Fusibles basse tension - Partie 5: Lignes directrices pour l'application des fusibles basse
tension
Ta slovenski standard je istoveten z: IEC TR 60269-5:2014
ICS:
29.120.50 Varovalke in druga Fuses and other overcurrent
nadtokovna zaščita protection devices
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
IEC TR 60269-5 ®
Edition 2.0 2014-03
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
colour
inside
Low-voltage fuses –
Part 5: Guidance for the application of low-voltage fuses
Fusibles basse tension –
Partie 5: Lignes directrices pour l’application des fusibles basse tension
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 29.120.50 ISBN 978-2-8322-1448-0
– 2 – IEC TR 60269-5:2014 © IEC 2014
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Fuse benefits . 12
5 Fuse construction and operation . 13
5.1 Components . 13
5.2 Fuse-construction . 13
5.2.1 Fuse link . 13
5.2.2 Fuse-link contacts . 14
5.2.3 Indicating device and striker . 14
5.2.4 Fuse-base . 14
5.2.5 Replacement handles and fuse-holders . 14
5.3 Fuse operation . 15
5.3.1 General . 15
5.3.2 Fuse operation in case of short-circuit . 15
5.3.3 Fuse operation in case of overload . 15
5.3.4 Fuse link pre-arcing time current characteristic: . 16
5.3.5 Fuse operation in altitudes exceeding 2 000 m . 17
6 Fuse-combination units . 18
7 Fuse selection and markings . 19
8 Conductor protection . 21
8.1 General . 21
8.2 Utilization category gG . 22
8.3 Utilization category gN and gD . 23
8.4 Utilization category gR and gS . 23
8.5 Utilization category gU . 24
8.6 Utilization category gK . 24
8.7 Utilization category gPV . 24
8.8 Protection against short-circuit current only . 24
9 Selectivity of protective devices . 24
9.1 General . 24
9.2 Selectivity between fuses . 25
9.2.1 General . 25
9.2.2 Verification of selectivity for operating time ≥ 0,1 s . 25
9.2.3 Verification of selectivity for operating time < 0,1 s . 26
9.2.4 Verification of total selectivity . 26
9.3 Selectivity of circuit-breakers upstream of fuses . 26
9.3.1 General . 26
9.3.2 Verification of selectivity for operating time ≥ 0,1 s . 27
9.3.3 Verification of selectivity for operating time < 0,1 s . 27
9.3.4 Verification of total selectivity . 27
9.4 Selectivity of fuses upstream of circuit-breakers . 28
9.4.1 General . 28
9.4.2 Verification of selectivity for operating time ≥ 0,1 s . 28
9.4.3 Verification of selectivity for operating time < 0,1 s . 28
9.4.4 Verification of total selectivity . 28
10 Short-circuit damage protection . 30
10.1 General . 30
10.2 Short-circuit current paths . 30
10.3 Current limitation . 31
10.4 Rated conditional short-circuit current, rated breaking capacity . 31
11 Protection of power factor correction capacitors . 31
12 Transformer protection . 32
12.1 Distribution transformers with a high-voltage primary . 32
12.2 Distribution transformers with a low-voltage primary . 33
12.3 Control circuit transformers . 33
13 Motor circuit protection . 33
13.1 General . 33
13.2 Fuse and motor-starter coordination . 34
13.3 Criteria for coordination at the rated conditional short-circuit current I . 34
q
13.4 Criteria for coordination at the crossover current I . 35
co
13.5 Criteria for coordination at test current “r” . 35
14 Circuit-breaker protection in a.c. and d.c rated voltage circuits . 36
15 Protection of semiconductor devices in a.c. and d.c. rated voltage circuits . 36
16 Fuses in enclosures . 38
16.1 General . 38
16.2 Limiting temperature of utilization category gG fuse-links according to
IEC 60269-2 – System A . 38
16.3 Other fuse-links . 38
17 DC applications . 38
17.1 General . 38
17.2 Short-circuit protection . 38
17.3 Overload protection . 39
17.4 Time-current characteristics . 40
18 Automatic disconnection for protection against electric shock for installations in
buildings . 40
18.1 General . 40
18.2 Principle of the protection . 41
18.3 Examples . 42
19 Photovoltaic (PV) system protection . 43
19.1 General . 43
19.2 Selection of PV fuse-links . 44
19.2.1 Fuse utilization category . 44
19.2.2 PV string fuses . 44
19.2.3 Fuse replacement . 44
19.2.4 Unearthed or Ungrounded PV Systems . 44
19.2.5 Functional earthing fuses . 44
19.2.6 PV array and PV sub-array fuses . 45
19.2.7 Fuse monitoring . 45
19.2.8 Breaking capacity . 45
19.2.9 Voltage of gPV fuses . 45
19.2.10 Rated current of gPV fuses . 45
– 4 – IEC TR 60269-5:2014 © IEC 2014
20 Protection of wind mills . 45
Annex A (informative) Coordination between fuses and contactors/motor-starters . 47
A.1 General . 47
A.2 Examples of suitable fuse-links used for motor protection . 47
A.3 Values of I t and cut-off current observed in successful tests of fuse-
link/motor-starter combinations worldwide . 48
A.4 Criteria for coordination at the rated conditional short-circuit current I . 51
q
A.4.1 General . 51
A.4.2 Maximum operating I t and cut-off current . 51
A.4.3 Guidance for choosing the maximum rated current of an alternative fuse
type . 52
A.4.4 Further guidance . 52
A.5 Criteria for coordination at test current "r" . 53
A.6 Types of coordination . 54
Bibliography . 57
Figure 1
...
IEC TR 60269-5 ®
Edition 2.1 2020-12
CONSOLIDATED VERSION
TECHNICAL
REPORT
colour
inside
Low-voltage fuses –
Part 5: Guidance for the application of low-voltage fuses
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Low-voltage fuses –
Part 5: Guidance for the application of low-voltage fuses
INTERNATIONAL
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ICS 29.120.50 ISBN 978-2-8322-9218-1
IEC TR 60269-5 ®
Edition 2.1 2020-12
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Low-voltage fuses –
Part 5: Guidance for the application of low-voltage fuses
– 2 – IEC TR 60269-5:2014+AMD1:2020 CSV
© IEC 2020
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Fuse benefits . 12
5 Fuse construction and operation . 13
5.1 Components . 13
5.2 Fuse-construction . 13
5.2.1 Fuse link . 13
5.2.2 Fuse-link contacts . 14
5.2.3 Indicating device and striker . 15
5.2.4 Fuse-base . 15
5.2.5 Replacement handles and fuse-holders . 15
5.3 Fuse operation . 15
5.3.1 General . 15
5.3.2 Fuse operation in case of short-circuit . 15
5.3.3 Fuse operation in case of overload . 16
5.3.4 Fuse link pre-arcing time current characteristic: . 17
5.3.5 Fuse operation in altitudes exceeding 2 000 m . 18
6 Fuse-combination units . 18
7 Fuse selection and markings . 20
8 Conductor protection . 23
8.1 General . 23
8.2 Utilization category gG . 23
8.3 Utilization category gN and gD . 25
8.4 Utilization category gR and gS . 25
8.5 Utilization category gU . 26
8.6 Utilization category gK . 26
8.7 Utilization category gPV . 26
8.8 Utilization category gBat . 26
8.9 Protection against short-circuit current only . 26
9 Selectivity of protective devices . 26
9.1 General . 26
9.2 Selectivity between fuses . 27
9.2.1 General . 27
9.2.2 Verification of selectivity for operating time ≥ 0,1 s . 27
9.2.3 Verification of selectivity for operating time < 0,1 s . 28
9.2.4 Verification of total selectivity . 28
9.3 Selectivity of between circuit-breakers upstream of and fuses . 28
9.3.1 General . 28
9.3.2 Verification of selectivity for operating time ≥ 0,1 s . 29
9.3.3 Verification of selectivity for operating time < 0,1 s . 29
9.3.4 Verification of total selectivity . 29
9.4 Selectivity of between fuses upstream of and circuit-breakers . 30
© IEC 2020
9.4.1 General . 30
9.4.2 Verification of selectivity for operating time ≥ 0,1 s . 30
9.4.3 Verification of selectivity for operating time < 0,1 s . 30
9.4.4 Verification of total selectivity . 30
10 Short-circuit damage protection . 32
10.1 General . 32
10.2 Short-circuit current paths . 32
10.3 Current limitation . 33
10.4 Rated conditional short-circuit current, rated breaking capacity . 33
11 Protection of power factor correction capacitors . 33
12 Transformer protection . 34
12.1 Distribution transformers with a high-voltage primary . 34
12.2 Distribution transformers with a low-voltage primary . 35
12.3 Control circuit transformers . 35
13 Motor circuit protection . 35
13.1 General . 35
13.2 Fuse and motor-starter coordination . 36
13.3 Criteria for coordination at the rated conditional short-circuit current I . 36
q
13.4 Criteria for coordination at the crossover current I . 37
co
13.5 Criteria for coordination at test current “r” . 37
14 Circuit-breaker protection in a.c. and d.c rated voltage circuits . 38
15 Protection of semiconductor devices in a.c. and d.c. rated voltage circuits . 38
15.1 General recommendations . 38
15.2 Fuse application with inverters . 40
15.2.1 Inverters . 40
15.2.2 Purpose of the fuse . 41
15.2.3 Current carrying capacity . 45
15.2.4 Voltage considerations . 45
15.2.5 I t characteristics . 46
15.2.6 Breaking range . 46
16 Fuses in enclosures . 46
16.1 General . 46
16.2 Limiting temperature of utilization category gG fuse-links according to
IEC 60269-2 – System A . 47
16.3 Other fuse-links . 47
17 DC applications . 47
17.1 General . 47
17.2 Short-circuit protection . 47
17.3 Overload protection . 48
17.4 Time-current characteristics . 49
18 Automatic disconnection for protection against electric shock for installations in
buildings . 49
18.1 General . 49
18.2 Principle of the protection . 50
18.3 Examples . 51
19 Photovoltaic (PV) system protection . 52
19.1 General . 52
19.2 Selection of PV fuse-links . 53
----
...
IEC TR 60269-5 ®
Edition 2.0 2014-03
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
colour
inside
Low-voltage fuses –
Part 5: Guidance for the application of low-voltage fuses
Fusibles basse tension –
Partie 5: Lignes directrices pour l’application des fusibles basse tension
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IEC TR 60269-5 ®
Edition 2.0 2014-03
TECHNICAL
REPORT
RAPPORT
TECHNIQUE
colour
inside
Low-voltage fuses –
Part 5: Guidance for the application of low-voltage fuses
Fusibles basse tension –
Partie 5: Lignes directrices pour l’application des fusibles basse tension
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 29.120.50 ISBN 978-2-8322-1448-0
– 2 – IEC TR 60269-5:2014 © IEC 2014
CONTENTS
FOREWORD . 6
INTRODUCTION . 8
1 Scope . 9
2 Normative references . 9
3 Terms and definitions . 10
4 Fuse benefits . 12
5 Fuse construction and operation . 13
5.1 Components . 13
5.2 Fuse-construction . 13
5.2.1 Fuse link . 13
5.2.2 Fuse-link contacts . 14
5.2.3 Indicating device and striker . 14
5.2.4 Fuse-base . 14
5.2.5 Replacement handles and fuse-holders . 14
5.3 Fuse operation . 15
5.3.1 General . 15
5.3.2 Fuse operation in case of short-circuit . 15
5.3.3 Fuse operation in case of overload . 15
5.3.4 Fuse link pre-arcing time current characteristic: . 16
5.3.5 Fuse operation in altitudes exceeding 2 000 m . 17
6 Fuse-combination units . 18
7 Fuse selection and markings . 19
8 Conductor protection . 21
8.1 General . 21
8.2 Utilization category gG . 22
8.3 Utilization category gN and gD . 23
8.4 Utilization category gR and gS . 23
8.5 Utilization category gU . 24
8.6 Utilization category gK . 24
8.7 Utilization category gPV . 24
8.8 Protection against short-circuit current only . 24
9 Selectivity of protective devices . 24
9.1 General . 24
9.2 Selectivity between fuses . 25
9.2.1 General . 25
9.2.2 Verification of selectivity for operating time ≥ 0,1 s . 25
9.2.3 Verification of selectivity for operating time < 0,1 s . 26
9.2.4 Verification of total selectivity . 26
9.3 Selectivity of circuit-breakers upstream of fuses . 26
9.3.1 General . 26
9.3.2 Verification of selectivity for operating time ≥ 0,1 s . 27
9.3.3 Verification of selectivity for operating time < 0,1 s . 27
9.3.4 Verification of total selectivity . 27
9.4 Selectivity of fuses upstream of circuit-breakers . 28
9.4.1 General . 28
9.4.2 Verification of selectivity for operating time ≥ 0,1 s . 28
9.4.3 Verification of selectivity for operating time < 0,1 s . 28
9.4.4 Verification of total selectivity . 28
10 Short-circuit damage protection . 30
10.1 General . 30
10.2 Short-circuit current paths . 30
10.3 Current limitation . 31
10.4 Rated conditional short-circuit current, rated breaking capacity . 31
11 Protection of power factor correction capacitors . 31
12 Transformer protection . 32
12.1 Distribution transformers with a high-voltage primary . 32
12.2 Distribution transformers with a low-voltage primary . 33
12.3 Control circuit transformers . 33
13 Motor circuit protection . 33
13.1 General . 33
13.2 Fuse and motor-starter coordination . 34
13.3 Criteria for coordination at the rated conditional short-circuit current I . 34
q
13.4 Criteria for coordination at the crossover current I . 35
co
13.5 Criteria for coordination at test current “r” . 35
14 Circuit-breaker protection in a.c. and d.c rated voltage circuits . 36
15 Protection of semiconductor devices in a.c. and d.c. rated voltage circuits . 36
16 Fuses in enclosures . 38
16.1 General .
...
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